any one know what might cause all my dvd software(interactual,realplayer,windvd and media player all to fail when loading a dvd film.dvd runs games though and i can acess the disk ok.i tried reformating and reinstalling everything which worked for a while but now the problem has resurfaced.ive tried reinstalling software and reinstalling the dvd driver...no luck.i use windows xp.geforce 1600gt graphics,sound is a sounblaster audigy2 zs.i dont know if its relevent but ive only had this problem since i had a new mainboard fitted. any help would be greatly appreciated.thanks.